When we hear of delivery drones, many people imagine a future scenario: hovering devices delivering orders directly to the balcony or front gate. But the reality is much more complex than that, and the biggest challenge is to ensure that these devices can navigate autonomously, safely and reliably in an often unpredictable urban environment. In this area, experts at the Systems and Control Laboratory (SCL) at HUN-REN SZTAKI have achieved world-class results by developing intelligent control solutions that enable drones to react to changes in the environment in real time – all with minimal energy consumption.